D-aspartic acid, or DAA for short, (the D- form of aspartic acid as opposed to the L- form) had been tested in the past for any nutritive value. Early on, it was thought that the D- forms of amino acids had no nutritive value, and that only the L- form could be utilized by the body. D- form amino acids fell by the wayside.

Lately, there has been a recurrence of interest in the D- form amino acids for any of the possible effects on the body.

DAA is primarily created in the body, but is also available in the food supply, making it DSHEA compliant.

Researchers started looking at where DAA was found in the body, and why. In other words, they wanted to know what function DAA has in the body. What Italian researchers found, was that DAA in both healthy men, and in mice, that DAA accumulates in the pituitary and causes in increased circulation of LH by 33%, and testosterone production by 42% when taking 3g daily. It also did not raise test by negatively affecting the HPTA, in fact, it helped it. No adverse reactions were reported during the study.